When Heber J. Grant (7th Prophet and President of The Church of Jesus Christ of Latter-day Saints) was a boy, he had a love for baseball. However, his abilities did not match his love for the game.
He resolved to improve, to be able to play in a major club of the state (Utah). He practiced, exercised, and practiced some more. In short, he persisted.
Heber realized that if he were to reach his goal, he needed to have his own baseball. He shined boots to earn the money to purchase a baseball and then spent hour after hour throwing the ball against the side of the neighbor's barn. Frequently, his arm would ache so intensely that he had trouble sleeping, but he kept at it. His efforts were rewarded, but only after he spent the necessary effort and time to make his dream come true.
Joy for today: following your heart.